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When a WhatsApp message fails, Meta returns a numeric error code. Nexor surfaces this code in the lead timeline, health checks, and API responses. Use the table below to identify the cause and take the right action.
You can manage your WhatsApp configuration directly in Meta Business Manager:

What Nexor does automatically

  • When a message fails with a billing error (131042), Nexor keeps the lead’s cadence active and attempts call or email when applicable, without retrying that send on WhatsApp. The exception is a first contact that Meta accepted and then failed: it retries after about 15 minutes. If Meta accepted the template and then failed it, a retry right after is not blocked as a duplicate.
    • Nexor pauses new templates on the WhatsApp Business Account and emails the billing link when three distinct leads fail within 24 hours with no paid delivery since. It also does this after a single failure when Meta says the currency or payment method is not set up, Meta’s status confirms the billing problem, and the account delivered no template in the last 7 days. Accounts whose billing Nexor manages get no email.
    • While paused, first contacts wait on WhatsApp. Nexor tests one template per number about once a day, sooner right after Meta reports the fix or when a single failure started the pause. Nexor cannot promise how long Meta takes to apply a fix.
  • When a Marketing message is blocked (131049), Nexor stops Marketing attempts to that lead for 14 days. If a Utility template is available and fits the context, it sends that instead.
  • When delivery fails terminally (131026), Nexor marks the lead unreachable on WhatsApp, cancels WhatsApp-only tasks, and tries the next available channel. Only a real inbound message from the lead re-enables WhatsApp for them.
  • When Meta blocks a message due to an experiment (130472), Nexor stops Marketing to that specific recipient number and tries Utility if appropriate.

Next steps

Delivery and quality

Monitor message delivery rates and quality signals.

Troubleshooting

Diagnose and resolve common WhatsApp issues.
Last modified on November 5, 2026